<script src="vue.js"></script>
<div id="app"><p>{{msg}}</p></div>
<script>
    var vue=new Vue(
        {
            el:'#app',
            data:{
                msg:"我有回来了"
            },
            mounted(){
                console.log("页面挂载之后")
                console.log(this.$el.innerHTML)
            },
            beforeMount(){
                console.log("页面挂载之前")
                console.log(this.$el.innerHTML)
            }
        }
    )
</script>
